Welcome to the NWIS-Web for the Arizona Water
Science Center

The majority of USGS Gaging Stations are funded though a cooperative
program between the USGS other interested agencies.
Follow this link for information on the Cooperative Water Program with
the USGS.

The statistics generated from this site are based on approved daily-mean data and
may not match those published by the USGS in official publications. The user is
responsible for assessment and use of statistics from this site. For more details
on why the statistics may not match, click here.